CN107701137A - A kind of pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly - Google Patents
A kind of pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly Download PDFInfo
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- CN107701137A CN107701137A CN201710321491.3A CN201710321491A CN107701137A CN 107701137 A CN107701137 A CN 107701137A CN 201710321491 A CN201710321491 A CN 201710321491A CN 107701137 A CN107701137 A CN 107701137A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 134
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 230000008859 change Effects 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 28
- 210000002445 nipple Anatomy 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 14
- 239000000956 alloy Substances 0.000 claims description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 238000012856 packing Methods 0.000 claims description 3
- 230000001737 promoting effect Effects 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 230000000630 rising effect Effects 0.000 claims 1
- 230000007423 decrease Effects 0.000 abstract description 13
- 230000006835 compression Effects 0.000 abstract description 8
- 238000007906 compression Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 13
- 239000013535 sea water Substances 0.000 description 9
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- 239000002283 diesel fuel Substances 0.000 description 3
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- 230000001186 cumulative effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 230000004888 barrier function Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention discloses a kind of pressure difference to change limit-type deep water casing-pipe cutting hydraulic cutter device greatly, including：Valve rod, positioning seat, valve stem spacing regulating part, and the first flexible member.Cutter device provided by the present invention so that valve stem spacing regulating part is after second flow channel fluid injection compression, the first flexible member by limited compression before, valve rod can be declined using upper and lower side pressure difference and fluid impulse force with piston synchronous；And after the first flexible member is by limited compression, valve rod can not continue to decline, and piston then continues to decline under injected fluid pressure, valve rod departs from nozzle, due to now pressure differential collapses above and below valve rod, it is up under the effect of the first flexible member, and the diameter of nozzle flow channel is more than valve rod runner, fluid pressure more than piston upper surface will decline suddenly；And by external pressure-display device, operator can be observed pressure and drastically decline, so as to know that sleeve pipe is cut off information.
Description
Technical field
The present invention relates to deep water drilling operation equipment technical field, more particularly to a kind of pressure difference to change limit-type deep water
Big casing-pipe cutting hydraulic cutter device.
Background technology
The exploitation of oil gas field will typically pass through exploration, Development Engineering construction, production and waste disposal overall process, waste disposal
It is final link therein.According to an international practice and《Offshore oil abandoned well job management rule》, offshore oil and gas field stopping production
After operation, if without other purposes or sensible argument, it is necessary to prepare retired and carry out waste disposal.It is retired to refer to fill in oil
Put from running status and be changed into what is closed, without the activity relevant with hydrocarbon state（Do not include being equipped with other with being moved away from
The activity of pass）.Waste disposal refers to move to petroleum installation finally, and the process for recycling, recycling or depositing on the spot.
In future development, large quantities of well heads is retired to turn into accomplished fact, particularly to the year two thousand twenty, is built before 2002
If all well heads it is nearly all retired, carry out abandoned well operation.In addition, in exploration process, some prospect pits or evaluation well pass through
After exploration and evaluation, if without extraction value, or " dry-well " of no oil gas is drilled out, it is both needed to carry out waste disposal.
Offshore oil and gas field waste disposal is one and is related to all many system engineerings, although the inverse mistake of Development Engineering
Journey, but its aspect being related to is incomplete same with development process, there is its special character.The Demolition Construction of offshore structures can return
Become separation（Mainly use cutting technique）, lifting, transport, disembarkation processing or marine reverse four parts.Wherein, machine cuts are
In separation process compared with frequently with technology, it is different from cumulative charge, and cumulative charge is by factors such as environment and technologies
Influence, using limited larger, machine cuts then limit without this.
In the prior art, imderwater cutting cutter device（Referred to machine cuts, hereinafter referred to as cutter device）Generally bag
Include：Cutter bod, cutting blade, bearing pin, piston component, spring, nozzle and the extension bar set gradually from the bottom to top, wherein, extension bar and
Piston component is respectively arranged with first flow and second flow channel, and nozzle is arranged between first flow and second flow channel, outside extension bar
Connect liquid supply equipment.When cutter device need to go into the well cutting, first with binding pieces such as adhesive tape or ropes by cutting blade colligation in cutting
In cutter hub；Secondly cutter device is transferred to cleavage；Again, added by first flow and second flow channel to piston component transfusion
Pressure, until piston component moves down, piston lower surface promotes blade upper end descending, start blade and open；Finally, rotary cutting knife piece
Casing-Cutting.
Prior art cutter device is disadvantageous in that：In cutting process, it can not learn when sleeve pipe cuts off, so as to make
Into after casing severing, cutter device continues to run with, and loses time and drilling platforms equipment runs resource, add and cut into
This.
Therefore, prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, there is provided a kind of pressure difference change limit
The position big casing-pipe cutting hydraulic cutter device of formula deep water, it is intended to which solution in cutting process, can not learn how is sleeve pipe in the prior art
When cut off, so as to cause after casing severing, cutter device continues to run with, lose time and drilling platforms equipment operation money
Source, the problem of improving cutting cost.
The technical proposal for solving the technical problem of the invention is as follows：
A kind of pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, including：Extension bar, it is connected to cutting for extension bar lower end
Cutter hub, and multiple one end are rotatably connected in the cutting blade of cutter bod, and the extension bar is provided with first flow, the cutter bod upper end
And lower end is respectively arranged with the second flow channel and third flow channel communicated with first flow, wherein, the pressure difference changes limit-type depth
The big casing-pipe cutting hydraulic cutter device of water is circumscribed with pressure-display device, and it also includes：
Piston, nozzle and the valve rod being set in turn in from the bottom to top in second flow channel, the piston after second flow channel fluid injection by
Pressure moves down, and overhanging to promote cutting blade to rotate around cutter bod, its outer fringe seal is in cutter bod inwall, and middle part is then along axle center side
To being provided through a piston runner；The nozzle is fixedly connected on piston, and its middle part is provided through one and piston runner
The nozzle flow channel communicated, be provided through in the middle part of the valve rod one communicated with nozzle flow channel and diameter less than nozzle flow channel valve
Bar runner；
The valve rod outer rim is arranged with positioning seat, the first flexible member and valve stem spacing regulating part successively from the bottom to top, described fixed
Position seat is fixedly installed in the middle part of second flow channel, is provided with the symmetrical liquid flow hole in several axle center；The valve stem spacing regulating part
Valve rod upper end is connected to, its band ovable valve stem that is pressurized after second flow channel fluid injection declines, while compresses the first flexible member, is reached at it
To before limit inferior position, valve rod is brought into close contact with nozzle, comes from the liquid of valve rod runner to ensure that nozzle flow channel only receives,
After it reaches limit inferior position, valve rod departs from nozzle so that nozzle flow channel can receive the liquid for coming from liquid flow hole, to carry out
Pressure release.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the valve
The spacing regulating part of bar is stop nut, and the stop nut is adjustable to be connected to valve rod, to adjust the disengaging position of valve rod and nozzle
Put, so as to carry out the work of the casing-pipe cutting of different size.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the valve
Bar includes：
The sliding part of positioning seat, the first flexible member and screw limiting regulating part is sequentially passed through, and it is integral with the sliding part
Shaping, in hemispherical, for being bonded the sticking part of nozzle, the cross section of the nozzle sticking part is more than the cross section of sliding part.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the valve
Bar upper end and valve stem spacing regulating part are contained in first flow after extension bar is connected with cutter bod.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the pressure
Difference, which changes the limit-type big casing-pipe cutting hydraulic cutter device of deep water, also to be included：
The flow nipple being sheathed at the top of valve rod outer rim, the flow nipple are located in first flow, and its outer rim and extension bar inwall it
Between be provided with a liquid stream gap；
A flow nipple runner is offered along axis direction in the middle part of the flow nipple, the flow nipple runner communicates with valve rod runner,
The change of magnitude of pressure differential can be adjusted by changing flow nipple.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, described the
A bushing is provided with two runners, the bushing is located at piston outer rim, and its upper surface is bonded with positioning seat lower surface；
The piston outer rim offers one to several support slot, and has sealing ring, the sealing ring by the support slot clamping
Inner side is fastened in support slot, and outside fits in the bushing.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the work
End is provided with a nozzle holding tank beyond the Great Wall, and the nozzle includes：The Piston connecting portion of the nozzle holding tank is contained in, and it is naked
The valve rod sticking part being exposed to above piston；
A packing ring is provided between the piston upper surface and the valve rod sticking part lower surface.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, the work
Plug lower section is provided with a contracting knife slide, and the contracting knife slide is movably arranged in third flow channel, and it is used for after casing severing
Rise, promote cutting blade to shrink back in cutter bod；
The contracting knife slide outer rim is arranged with one second flexible member, and second flexible member is pressed when contracting knife slide declines
Contracting, and resetted after piston is no longer pressurized, promote contracting knife slide to rise.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, cutting blade
Outer middle side part is vertically arranged with a chip area, and an alloy chip is respectively arranged with the left of chip area and on the lateral surface on right side
Sword.
In preferred scheme, described pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, wherein, it is described to cut
Blade is provided with four, and four cutting blades are arranged at intervals at cutter bod outer rim.
Pressure difference provided by the present invention changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, as a result of setting
There is diameter to be less than the valve rod of the valve rod runner of nozzle flow channel, be sheathed on valve rod outer rim and the positioning seat being fixed in second flow channel,
The valve stem spacing regulating part of valve rod upper end is connected to, and the first flexible member being arranged between positioning seat and valve rod so that valve
The spacing regulating part of bar second flow channel fluid injection compression after, the first flexible member by limited compression before, valve rod can be with piston synchronous
Decline, ensure that valve rod can be brought into close contact with nozzle, now, the 3rd stream can only can just be flow to by valve rod runner by injecting liquid
Road；And after the first flexible member is by limited compression, valve rod can not continue to decline, and piston is then under injected fluid pressure
Continue to decline, valve rod departs from nozzle, and now, cutting blade blade reaches specified location under the promotion of piston, has cut off set
Pipe, and valve rod runner is also no longer the necessary channel that injected liquid flow to third flow channel, because the diameter of nozzle flow channel is more than
Valve rod runner, fluid pressure more than piston upper surface will decline suddenly；It is and considerable by external pressure-display device, operator
Observe pressure drastically to decline, so as to know that sleeve pipe is cut off.Efficiently solve in the prior art in deep water cutting process,
It can not learn when sleeve pipe cuts off, so as to cause after casing severing, cutter device continues to run with, and loses time and drilling well is put down
Platform equipment runs resource, the problem of adding cutting cost.
Brief description of the drawings
Fig. 1 is that the new pressure difference of the present invention changes limit-type deep water casing-pipe cutting hydraulic cutter device cutting blade opening greatly extremely
The profile of preferred embodiment during extreme position.
Local A enlarged drawing in Fig. 2 Fig. 1 of the present invention.
Fig. 3 is that the new pressure difference of the present invention changes limit-type deep water casing-pipe cutting hydraulic cutter device cutting blade greatly and is retracted to and cuts
The profile of preferred embodiment during cutter hub.
Fig. 4 is the efficient deep water abandoned well hydraulic cutter device cutting edge position view of major diameter of the present invention.
Embodiment
To make the objects, technical solutions and advantages of the present invention clearer, clear and definite, develop simultaneously embodiment pair referring to the drawings
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
The limit-type deep water casing-pipe cutting hydraulic cutter device greatly of pressure difference change is connected to drilling platforms in the present invention, belongs to deep
Water underwater operation instrument, it is larger with common cutter device difference, so it is easy to understand that because it need to be operated in deep water,
It is the same without the common cutting equipment of the image of Buddha, the progress of observable cutting at any time, no small difficulty is brought to casing-pipe cutting, is also increased
Great cost.
It is understood that drilling platforms use cost is high, such as 981 drilling platforms, it sends out equipped with 8 4.4 ten thousand kilowatts of diesel oil
Motor, needed for generated energy a close to medium-sized city, tender is needed to convey diesel oil, fresh water, daily necessities and various consumptions weekly
Material etc..According to statistics, 981 drilling platforms averagely consume 30 tons of diesel oil daily, reach as high as 60 to 70 tons, nearly 40 tons of fresh water, add
180 personnel and other consumption, along with daily rental fee more than 300 ten thousand, day rate convert into the RMB of 400-500 ten thousand（Off position
Under）, and the consumption under working condition is undoubtedly higher.It can be said that the insignificant stop of per a moment of drilling platforms will all make
Into the waste of huge amounts of material.In the prior art, because in the past old-fashioned common waterpower cutter device can not effectively know casing severing
Time, it is inevitable to cause the operation resource of drilling platforms and the waste of residence time, therefore, passes through skill provided by the present invention
Art scheme solves the problem, so as to save the consumption of drilling platforms, has earthshaking meaning.
Fig. 1 to Fig. 3 is referred to, a kind of pressure difference that present pre-ferred embodiments provide changes limit-type deep water casing-pipe cutting greatly
Hydraulic cutter device（Abbreviation cutter device）, a pressure-display device is circumscribed with, the pressure-display device is arranged at drilling well and put down
On platform, the fluid pressure change in second flow channel can be shown, the measurement of fluid pressure and is shown as prior art, it is no longer superfluous herein
State.Present invention focuses on the structure improvement that pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is set such as
Under：
Including extension bar 1, insertion is connected to the cutter bod 2 of the lower end of extension bar 1, and extension bar 1 is provided with one along axis direction and is used to note
Liquid pressurization makes the first flow that cutter device is started working, and the upper end of cutter bod 2 and lower end are then respectively arranged with one along axis direction
Second flow channel and third flow channel, the liquid injected by first flow successively flow through second flow channel and third flow channel, should be noted
, it is provided between the second flow channel and third flow channel multiple substantially in the cutting blade loose slot of undercut font, cutting blade 9
When non-fluid injection is pressurizeed, cutting blade loose slot is completely accommodated in, and after fluid injection pressurization, then under the promotion of piston 6, close to
One end rotation of piston 6, the other end are overhanging.
In preferred embodiments of the present invention, the second flow channel includes：The extension bar connecting portion from top to bottom set gradually
And positioning seat fixed part；The cross section of the extension bar connecting portion is in wide at the top and narrow at the bottom trapezoidal；The positioning seat fixed part is in cylinder
Type, its lower end are provided with a bushing 3, and the bushing 3 is located at the outer rim of piston 6, and its upper surface is bonded with the lower surface of positioning seat 11；
And the outer rim of piston 6 then offers one to several support slot, and there are a sealing ring 7, the sealing ring 7 by the support slot clamping
Inner side is fastened in support slot, and outside is brought into close contact in the bushing 3.
The shape adaptation of extension bar connecting portion is to ensure the connective stability of the two in the lower end of extension bar 1.
The upper end of extension bar 1 can jointed rod, this is prior art, the present invention no longer it is repeated herein.
The invention difference from existing technology is that prior art is pressurizeed under direct drive piston component by fluid injection
Drop, realizes that the rotation of cutting blade 9 is overhanging, its internal liquid pressure value is fixed.It is of the invention then by being arranged at second flow channel
Interior piston 6, nozzle 4 and valve rod 10, positioning seat 11, the first flexible member 13 and valve stem spacing regulating part 14 so that cutter fills
Two states can be brought into close contact and depart from by nozzle 4 and valve rod 10 by putting, and pressure suddenly change be realized, so as to become by pressure
Change, know that cutting edge has reached predeterminated position, and sleeve pipe is also cut off.
As shown in figure 4, in the present invention, a cutting blade 9 is provided with each cutting blade loose slot, each cutting blade 9 is all
The first alloy cutting edge 19 is provided with the lateral surface in the left side of chip area 18, and is set on the lateral surface on the right side of chip area 18
There is the second alloy cutting edge 20；Or the second alloy cutting edge 20 is provided with the lateral surface in the left side of chip area 18, and in chip removal
Be provided with the first alloy cutting edge 19 on the lateral surface on the right side of groove 18, particular location refer to Fig. 4, the first alloy cutting edge 19 and
The set location of second alloy cutting edge 20 should be advantageous for excluding sleeve pipe bits.
First alloy cutting edge 19 and the second alloy cutting edge 20 are arranged on the left side of chip area 18 or right side, to depend on
When being cut, the direction of rotation of cutter bod 2, if that is, cutter bod 2 turns clockwise, the second alloy cutting edge 20 is fixed on
The right side of cutting blade 9, and right side is concordant with the right flank of cutting blade 9, is otherwise unfavorable for Casing-Cutting, can not also be discharged by chip area
Sleeve pipe is considered to be worth doing；And the first alloy cutting edge 19 is then fixed on the left side of chip area 18, so, during chip sleeve pipe could by set up separately two
Individual cutting edge priority Casing-Cutting, accelerate cutting efficiency；During 2 rotate counterclockwise of cutter bod, principle is identical, repeats no more.
Except chip area 18 setting and cutting edge quantity unlike the prior art in addition to, the quantity of cutting blade 9 also with it is existing
Technology is different.The quantity of cutting blade 9 of prior art is provided only with three, of the invention then be provided with four, and this is not only quantity
Different changes, it also solves the problem of cutting blade 9 easily rocks in the prior art.Three exist cutting blade 9 in the prior art
When being cut, because its stress is asymmetric, cutting blade 9 can be caused to rock（Such as, one of cutting blade 9 touches barrier
When, it is rocked by resistance, and due to being supported on internal surface of sleeve pipe without symmetrically arranged cutting blade 9 so it can be produced）, and this
Cutting blade 9 is changed to four by invention, the symmetrically arranged stress equalization of cutting blade 9, it is higher to cut stability.
That is, the present invention is not merely to improve the setting quantity that cutting efficiency just changes cutting blade 9, it is heavier
Want, which raises the stability during work of cutting blade 9, certainly, due to the increase of the quantity of cutting blade 9, coordinate each cutter
Piece 9 can all be connected two cutting edges so that the cutting edge quantity of cutter device by three changes of script for eight, greatly
It is also one of emphasis improvement of the present invention to improve chip efficiency.
It is preferred that the cutting blade 9 is rotatably connected in cutter bod 2 by bearing pin 16, and the lateral surface of cutting blade 9 is to deviate to cut
The side of cutter hub 2 is welded with broken alloy 17.
In present pre-ferred embodiments, piston 6, nozzle 4 and valve rod 10 are set in turn in second flow channel from the bottom to top,
Positioning seat 11, the first flexible member 13 and valve stem spacing regulating part 14 are then sheathed on the outer rim of valve rod 10 successively from the bottom to top.
The piston 6 can move up and down in second flow channel, and its power comes from the pressure that injected liquid is brought, piston
The 6 extended second flow channel in lower end, it is overhanging so as to promote cutting blade 9 to start to rotate into cutting blade loose slot.The piston 6
Outer rim should be sealed in the inwall of cutter bod 2, prevent gap between piston 6 and cutter bod 2 being present, on the one hand ensure that fluid pressure is enough
Piston 6 is promoted to decline；On the other hand, liquid leakage is prevented, pressure-display device shows that pressure declines, causes operator to judge by accident.
When specifically used, piston 6 is sealed in the inwall of cutter bod 2 by external sealing ring 7, and the inner side of sealing ring 7 fits in piston 6,
Outside fits in the inwall of cutter bod 2；The piston 6 offers a support slot for being used for clamping sealing ring 7.The sealing ring 7 is set
One or more is equipped with, its longitudinal section is in inverted Y-shaped, will not be due to the frictional force between bushing 3 while to ensure sealing
It is excessive and cause that piston 6 can not decline or decrease speed is limited, so that influenceing casing-pipe cutting efficiency.
When it is implemented, being provided with a bushing 3 in the second flow channel, the replacing being easy to after abrasion, the bushing 3 is located at
The outer rim of piston 6, and its upper surface is bonded with the lower surface of positioning seat 11；The outer rim of piston 6 offers a support slot, and passes through institute
Stating support slot clamping has a sealing ring 7, and the inner side of sealing ring 7 is fastened in support slot, and outside fits in the bushing 3.
The upper end of piston 6 is provided with a nozzle holding tank, and the nozzle 4 includes：It is contained in the nozzle holding tank
Piston connecting portion, and it is exposed to the valve rod sticking part of the top of piston 6；Under the upper surface of piston 6 and the valve rod sticking part
A packing ring 5 is provided between end face.
It is preferred that the nozzle 4 is threadedly connected to piston 6, while being fixedly connected so as to the two, conveniently safeguarded or more
Change, the nozzle 4 is provided with nozzle flow channel, and nozzle flow channel is the necessary channel that liquid flows to third flow channel in second flow channel.
Nozzle 4 and the structure of nozzle 4 of the prior art and differed in the present invention, in the prior art the nozzle flow channel set by nozzle 4
In funnel type, nozzle flow channel is arranged to cylindrical type in the present invention, has a diameter larger than the diameter of valve rod runner, the setting precisely in order to
It is front and rear to realize that nozzle 4 and valve rod 10 depart from, the change of fluid pressure and set.It can be seen that nozzle 4 and prior art in the present invention
In the structure of nozzle 4 with effect differ.
The valve rod 10 is provided with valve rod runner, and it declines under the drive of valve stem spacing regulating part 14, is limited in valve rod
Before position regulating part 14 reaches limit inferior position, valve rod 10 is bonded with nozzle 4, and now, valve rod runner is liquid flow in second flow channel
Move to the necessary channel of third flow channel, and the upper surface of piston 6 and the inwall of cutter bod 2 will be formed one can only enter to go out it is semiclosed
Accommodating chamber；And after valve stem spacing regulating part 14 reaches limit inferior position, valve rod 10 departs from nozzle 4, and valve rod runner will no longer
The necessary channel of third flow channel is flowed to as liquid in second flow channel, and flow to the upper surface of piston 6 and the inwall of cutter bod 2 it
Between liquid third flow channel can be flow to by nozzle flow channel, when being bonded relative to valve rod 10 with nozzle 4, the upper end surface of piston 6
Fluid pressure decline, shown by external pressure-display device.
When it is implemented, the valve rod 10 may be configured as torus, i.e. the cross section of valve rod 10 is in annular, with nozzle 4
During fitting, the upper end end face of nozzle 4 is bonded by the lower end surface of valve rod 10.But in order to which that improves valve rod 10 and nozzle 4 is bonded compactness,
More preferably scheme is that the lower end of valve rod 10 and upper end of nozzle are arranged into convex-concave sphere, it is to be understood that after the fitting of convex-concave sphere
Sealing and centering be significantly larger than the fitting effects of two planes；The concrete structure of valve rod 10 may include：It is fixed to sequentially pass through
Position seat 11, the sliding part of the first flexible member 13 and screw limiting part, and be integrally formed with the sliding part, in hemispherical,
For being bonded the nozzle sticking part of nozzle 4, the cross section of the nozzle sticking part is more than the cross section of sliding part.
The using effect of nozzle sticking part prevents on the one hand as described above, that improves valve rod 10 and nozzle 4 is bonded compactness
The liquid of nozzle flow channel is flowed to outward leakage by valve rod runner；On the other hand, then realized by its cross section, because its cross section is big
In the cross section of sliding part, so in second flow channel after fluid injection pressure, the part that nozzle sticking part protrudes from sliding part will be by
The fluid pressure extra to one, promotes it to move down, and the setting can improve synchronism when valve rod 10 declines with nozzle 4.
It is clear that one is used for connecting screw locating part, the two is used for for the first elasticity member for the effect of the sliding part
The compression of part 13 is oriented to, and three is used for the drive in screw limiting part, and under the guiding of positioning seat 11, along axis direction to moving down
It is dynamic.
The positioning seat 11 has two effects, one be used to valve rod 10 move up and down guiding and spacing, second, can lead to
The liquid flow hole being arranged on is crossed, fluid injection to the upper surface of piston 6, forms the pressure for promoting piston 6 to move down.Positioning seat 11 is fixed on
In the middle part of second flow channel, its axis direction is provided through one and is arranged the pilot hole for adapting to valve rod 10.When it is implemented, liquid flow hole
Two or four is may be configured as, should at least set two, ensures liquid flow velocity and the stress equalization of piston 6, is preferably arranged to
Four, so that the upper surface stress equalization of piston 6.
For the valve stem spacing regulating part 14 during with a casing-pipe cutting, the relative position with valve rod 10 is fixed
, preferable scheme, which is that valve stem spacing regulating part 14 is adjustable, is connected to valve rod 10, to adjust the disengaging of valve rod 10 and nozzle 4
Position, so as to carry out the work of the casing-pipe cutting of different size；When it is implemented, valve stem spacing regulating part 14 can be arranged to spacing
Nut, not only position adjustments are convenient, and higher with the connection reliability of valve rod 10.The quantity of stop nut is preferably arranged to two
Individual, for two stop nuts for a stop nut, interlocking capability is relatively good, under deepwater environment, two stop nuts
Mutually position will not change after locking, set two stop nuts to improve the spacing reliability with valve rod 10.
And the outer rim of valve rod 10, the lower section of the first flexible member 13, the upper surface of positioning seat 11 is additionally provided with a spring guide
12。
In the present invention further preferred embodiment, the pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter greatly
Device also includes：
The flow nipple 15 being sheathed at the top of the outer rim of valve rod 10, the flow nipple 15 are located in first flow, and its outer rim and extension bar 1
A liquid stream gap is provided between inwall；The middle part of flow nipple 15 offers a flow nipple runner, the section along axis direction
Stem bar runner communicates with valve rod runner, and its diameter is less than valve rod runner.
In the present invention further preferred embodiment, the lower section of piston 6 is provided with a contracting knife slide, and the contracting knife is slided
Seat is movably arranged in third flow channel, and it is used to rise after casing severing, promotes cutting blade 9 to shrink back in cutter bod 2；Institute
To state contracting knife slide outer rim and be arranged with one second flexible member, second flexible member is compressed when contracting knife slide declines, and
Resetted after piston 6 is no longer pressurized, promote contracting knife slide to rise.
Due to the presence of contracting knife slide and the second flexible member, before non-fluid injection pressurization, cutting blade 9 be can not rotate it is overhanging
's；And after fluid injection pressurization, before cutting completion, cutting blade 9 also can only gradually rotate overhanging；After the completion of cutter work, contracting knife
Slide will promote cutting blade 9 to reset, and no longer only rely on the deadweight of cutting blade 9 and shrink.Therefore, this invention also solves prior art
Middle cutter device is dropped to before sleeve pipe, and the binding piece of cutting blade 9 easily collapses out, so as to lead to not sleeve pipe；Infused
During pressurizing and propping cutting blade 9, cutting blade 9 is open configuration by being tied state suddenly change, and collision, damage are produced with internal surface of sleeve pipe
Bad cutting edge, clipping time is extended, reduce cutting efficiency；And after the completion of cutting, cutting blade 9 is contracted to by deadweight
During cutter bod 2, there is sleeve pipe scrap because containing in buoyant of sea water or cutter bod 2, cutter bod 2 can not often be completed to withdraw withdrawing
The problem of.
After cutter device transfers to specified location, seawater is passed through（Drilling fluid also may be used）, when just starting, a part of seawater from
Runner of the runner of extension bar 1 through flow nipple 15, valve rod 10, nozzle 4, piston 6 flows downward, and another part seawater flows through positioning seat 11
On 4 liquid flow holes act on piston, after seawater is full of in the runner of nozzle 4 and piston 6, all seawater are through the He of valve rod 10
Aperture on nozzle 4 flows away downwards.According to Hydrodynamics Theory, due to the setting of nozzle flow channel, seawater produces pressure at nozzle 4
Drop；Valve rod 10 is longer, and seawater can be produced along stroke pressure when flowing through valve rod 10 and lost；When seawater enters nozzle 4 by valve rod 10, stream
Road caliber becomes big suddenly, can produce local pressure loss.The fluid pressure as caused by this three parts pressure drop promotes valve rod 10 with living
Plug 6 is synchronous to be declined, and the lower surface of piston 6 promotes the end of cutting blade 9 descending, due to passing through bearing pin between blade and hydraulic cutter housing
8 connect, then blade opens, Casing-Cutting.
And judge whether cutting is completed to rely on：When the cut is completed, the compression spring 13 of valve stem spacing regulating part 14 is to necessarily
Distance, now valve rod 10 is no longer moved down due to the limitation of locating part 14, and piston 6 continues to move down, and causes valve rod 10
Lower end sphere separates with piston 6 and nozzle 4；After separating, the upper and lower side pressure differential collapses of valve rod 10, and valve rod 10 can recover in spring
It is up in the presence of power.It can be seen from Hydrodynamics Theory, fluid can produce pressure drop at nozzle 4, and this caused pressure drop is bright
The aobvious pressure drop being less than in hydraulic cutter normal operation, therefore may determine that and cut by the significant changes of logging presentation pressure drop on platform
Cut and whether complete.
It should be appreciated that the application of the present invention is not limited to above-mentioned citing, for those of ordinary skills, can
To be improved or converted according to the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect scope.
Claims (10)
1. a kind of pressure difference changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, including：Extension bar, it is connected to extension bar lower end
Cutter bod, and multiple one end are rotatably connected in the cutting blade of cutter bod, and the extension bar is provided with first flow, on the cutter bod
End and lower end are respectively arranged with the second flow channel and third flow channel communicated with first flow, it is characterised in that the pressure difference change
The limit-type big casing-pipe cutting hydraulic cutter device of deep water is circumscribed with pressure-display device, and it also includes：
Piston, nozzle and the valve rod being set in turn in from the bottom to top in second flow channel, the piston after second flow channel fluid injection by
Pressure moves down, and overhanging to promote cutting blade to rotate around cutter bod, its outer fringe seal is in cutter bod inwall, and middle part is then along axle center side
To being provided through a piston runner；The nozzle is fixedly connected on piston, and its middle part is provided through one and piston runner
The nozzle flow channel communicated, be provided through in the middle part of the valve rod one communicated with nozzle flow channel and diameter less than nozzle flow channel valve
Bar runner；
The valve rod outer rim is arranged with positioning seat, the first flexible member and valve stem spacing regulating part successively from the bottom to top, described fixed
Position seat is fixedly installed in the middle part of second flow channel, is provided with the symmetrical liquid flow hole in several axle center；The valve stem spacing regulating part
Valve rod upper end is connected to, its band ovable valve stem that is pressurized after second flow channel fluid injection declines, while compresses the first flexible member, is reached at it
To before limit inferior position, valve rod is brought into close contact with nozzle, comes from the liquid of valve rod runner to ensure that nozzle flow channel only receives,
After it reaches limit inferior position, valve rod departs from nozzle so that nozzle flow channel can receive the liquid for coming from liquid flow hole, to carry out
Pressure release.
2. pressure difference according to claim 1 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
The valve stem spacing regulating part is stop nut, and the stop nut is adjustable to be connected to valve rod, to adjust valve rod and nozzle
Disengaging configuration, so as to carry out the work of the casing-pipe cutting of different size.
3. pressure difference according to claim 1 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
The valve rod includes：
The sliding part of positioning seat, the first flexible member and screw limiting regulating part is sequentially passed through, and it is integral with the sliding part
Shaping, in hemispherical, for being bonded the sticking part of nozzle, the cross section of the nozzle sticking part is more than the cross section of sliding part.
4. pressure difference according to claim 1 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
The valve rod upper end and valve stem spacing regulating part are contained in first flow after extension bar is connected with cutter bod.
5. pressure difference according to claim 4 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
The pressure difference, which changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, also to be included：
The flow nipple being sheathed at the top of valve rod outer rim, the flow nipple are located in first flow, and its outer rim and extension bar inwall it
Between be provided with a liquid stream gap；
A flow nipple runner is offered along axis direction in the middle part of the flow nipple, the flow nipple runner communicates with valve rod runner,
The change of magnitude of pressure differential can be adjusted by changing flow nipple.
6. pressure difference according to claim 1 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
A bushing is provided with the second flow channel, the bushing is located at piston outer rim, and its upper surface is bonded with positioning seat lower surface；
The piston outer rim offers one to several support slot, and has sealing ring, the sealing ring by the support slot clamping
Inner side is fastened in support slot, and outside fits in the bushing.
7. pressure difference according to claim 6 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly, it is characterised in that
The piston upper end is provided with a nozzle holding tank, and the nozzle includes：The Piston connecting portion of the nozzle holding tank is contained in,
And it is exposed to the valve rod sticking part above piston；
A packing ring is provided between the piston upper surface and the valve rod sticking part lower surface.
8. pressure difference according to any one of claim 1 to 7 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly,
Characterized in that, be provided with a contracting knife slide below the piston, the contracting knife slide is movably arranged in third flow channel, its
For rising after casing severing, promoting cutting blade to shrink back in cutter bod；
The contracting knife slide outer rim is arranged with one second flexible member, and second flexible member is pressed when contracting knife slide declines
Contracting, and resetted after piston is no longer pressurized, promote contracting knife slide to rise.
9. pressure difference according to any one of claim 1 to 7 changes limit-type deep water casing-pipe cutting hydraulic cutter device greatly,
Characterized in that, the outer middle side part of cutting blade is vertically arranged with a chip area, and divide on the left of chip area and on the lateral surface on right side
An alloy cutting edge is not provided with.
Exist 10. pressure difference according to claim 9 changes limit-type deep water casing-pipe cutting hydraulic cutter device, its feature greatly
In the cutting blade is provided with four, and four cutting blades are arranged at intervals at cutter bod outer rim.
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| CN201710321491.3A CN107701137B (en) | 2017-05-09 | 2017-05-09 | Differential pressure change limiting type deep water large sleeve cutting hydraulic cutter device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710321491.3A CN107701137B (en) | 2017-05-09 | 2017-05-09 | Differential pressure change limiting type deep water large sleeve cutting hydraulic cutter device |
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| CN107701137B CN107701137B (en) | 2023-07-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222875A (en) * | 2018-03-20 | 2018-06-29 | 长江大学 | A kind of deep water waterpower cutter device of pressure pulse waveform indicating type |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107701137B (en) | 2023-07-18 |
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